I've just tried with r287 and can't reproduce the issue.
The button is supposed to be greyed out only if the text field is empty (or reply action is not available). Did it not turn orange when you entered text?
I've just tried with r287 and can't reproduce the issue.
The button is supposed to be greyed out only if the text field is empty (or reply action is not available).
Did it not turn orange when you entered text?